For those of you testing the new Linear Rendering mode it is very important to highlight that in this mode we perform all the calculations in linear (instead of SRGB) space. This means that gradients, textures and alpha blending is going to be rendered differently from the normal mode and also from WPF. Also text rendering is a bit different. We recommend using OTF fonts instead of TTF because the rendering engine is better, specially for small sizes where contrast is very important.